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`"radius"_"(Circle)" = sqrt(( "x" - "h" )^2 + ( "y" - "k" )^2)`

Enter a value for all fields

This **Radius of a Circle** calculator computes the radius of a circle given the circle's center and a point *Circle*anywhere on the circle.

**INSTRUCTIONS:** Enter the following:

- (
**h**) This is the X-coordinate of the circle's center - (
**k**) This is the Y-coordinate of the circle's center - (
**x**) This is the X-coordinate of the point on the circle - (
**y**) This is the Y-coordinate of the point on the circle

**Radius:** The calculator returns the radius of the circle defined by these two points.

To compute the general form of the equation of a circle from the center point (h,k) and a point on the circle (x,y), CLICK HERE. The general form of a circle is typically as follows: X^{2} + bX + Y^{2} + dY + e = 0

Note, the radius in this calculation is simply the distance between the two points. The circle's center can be placed anywhere in the X-Y Plane. The circle in this equation is centered at the point (h,k) and the point on the circle is (x,y)

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